The wood midges (Diptera: Lestremiidae) of Allegheny County, PennsylvaniaBy John Plakidas
Abstract: The wood midges (Diptera: Lestremiidae) from Allegheny County Pennsylvania, USA are presented. Thirty eight species in twenty three genera have been recorded. A detailed larval, pupal and adult diagnosis is also provided for the first time which supports the monophyly of the Lestremiidae (Diptera). One new genus and species, Cratotocha ampliata gn. n. et sp. n. and two additional new species Polyardis carinata sp. n. and Excerscentia alleghenyensis sp. n.. are also described and illustrated. The systematic model for the Lestremiidae includes three subfamilies: Catotrichinae, Lestremiinae, and Micromyinae. Separate keys to the genera for larvae and adults are also included. These keys incorporate newly discovered taxa from North America including extralimital genera.